with obj.
1
- find or discover by investigation（通过调查）找到, 发现：
police are trying to trace a white van seen in the area.
警方正设法查找曾在此地区出现的白色货车。
1.1
- find or describe the origin or development of追溯, 追究, 查考：
Bob's book traces his flying career with the RAF.
鲍勃的书追溯了他在英国皇家空军的飞行生涯。
1.2
- follow or mark the course or position of (something) with one's eye, mind, or finger追踪, 跟踪：
through the binoculars, I traced the path I had taken the night before.
我用双筒望远镜追踪了昨晚走的路。
1.3
- take (a particular path or route)沿（特定路径）走：
a tear traced a lonely path down her cheek.
一滴泪珠孤寂地滑下她的脸颊。
2
- copy (a drawing, map, or design) by drawing over its lines on a superimposed piece of transparent paper映描, 描摹。
2.1
- draw (a pattern or line), especially with one's finger or toe（尤指用手指、脚趾）画（图, 线）。
2.2
- give an outline of勾画出轮廓, 描绘：
the article traces out some of the connections between education, qualifications, and the labour market.
这篇文章勾勒出教育, 资格及劳动力市场之间的某些联系。
1
- a mark, object, or other indication of the existence or passing of something痕迹, 踪迹：
remove all traces of the old adhesive
除去所有旧的粘合剂留下的痕迹
mass noun the aircraft disappeared without trace.飞机消失得无影无踪。
1.1
- W. Indian & US a beaten path or small road; a track〈西印度, 美〉踏出来的小路, 小径; 小道。
1.2
- a physical change in the brain presumed to be caused by a process of learning or memory（大脑上的学习或记忆）痕迹, 印迹。
1.3
- Linguistics (in transformational grammar) a slot from which an element has been moved by a transformation【语言学】（转换生成语法中的）语迹。
1.4
- a procedure to investigate the source of something, such as the place from which a telephone call was made, or the origin of a fault in a computer program（确定来电话者或计算机程序里确定故障源的）跟踪。
2
- a very small quantity, especially one too small to be accurately measured微量, 少许（尤指太少无法精确量算）：
his body contained traces of amphetamines
他身体里有微量安非他明
as modifier trace quantities of PCBs.微量多氯化联苯。
2.1
- a slight indication or barely discernible hint of something丝毫; 勉强可以发现的痕迹：
just a trace of a smile.
仅是一丝微笑。
3
- a line or pattern displayed by an instrument using a moving pen or a luminous spot on a screen to show the existence or nature of something which is being investigated描记线, 描记图。
3.1
- a line which represents the projection of a curve or surface on a plane or the intersection of a curve or surface with a plane交线, 迹线, 轨迹。
4
- Mathematics the sum of the elements in the principle diagonal of a square matrix【数】迹。
派生词
traceability
nountraceable
adjectivetraceless
adjective词源
Middle English （first recorded as a noun in the sense 'path that someone or something takes'）： from Old French trace (noun), tracier (verb), based on Latin tractus （see TRACT1 ）.